缺省源

#include
#define LL long long
#define N 100005
using namespace std;

inline LL mr()
{
	LL x=0;bool f=0;char ch=getchar();
	while(ch<'0'||ch>'9'){if(ch=='-') f=1;ch=getchar();}
	while(ch>='0'&&ch<='9'){x=(x<<3)+(x<<1)+(ch^48);ch=getchar();}
	return f?-x:x;
}

int main()
{
	return 0;
}